Men's Hoka Challenger ATR 8 All Terrain Running Shoe Color:Maple Cardamon As mentioned in the description

As mentioned in the description above this technology took the strongest structure in nature and placed in on the outsole

Compatible with Coros armband heart rate monitors

and slick slabs

Outsole & TractionUses Durabrasion rubber

Made with sustainable recycled polyester jersey

Men's Hoka Challenger ATR 8 All Terrain Running Shoe Color:Maple Cardamon As mentioned in the descriptionMen's Hoka Challenger ATR 8 All Terrain Running Shoe Design & Build Midsole CushioningUses compression molded EVA (CMEVA) foam thats softer than prior versions. Theres more foam underfoot in this Challenger 8 than the Challenger 7. The stack height is ~42 mm in heel and ~34 mm in the forefoot (mens) giving a plush platform. Drop~8 mm heel to toe drop. Thats increased from previous versions. Outsole & Lugs Traction4 mm multi directional lugs for grip